diff --git a/SDMetaUI/Controllers/ImagesController.cs b/SDMetaUI/Controllers/ImagesController.cs
index f877290..5e9a6c9 100644
--- a/SDMetaUI/Controllers/ImagesController.cs
+++ b/SDMetaUI/Controllers/ImagesController.cs
@@ -17,6 +17,7 @@ public static IResult GetThumb(
                 string physicalPath = Base32Decode(path);
                 if (fileSystem.File.Exists(physicalPath))
                 {
+                    EnableCaching(httpResponse);
                     var fileInfo = fileSystem.FileInfo.New(physicalPath);
                     var thumbPath = thumbnailService.GetOrGenerateThumbnail(fileInfo.FullName);
                     httpResponse.Headers.LastModified = fileInfo.LastWriteTimeUtc.ToString("R");
@@ -46,6 +47,7 @@ public static IResult GetFull(
                 string physicalPath = Base32Decode(path);
                 if (fileSystem.File.Exists(physicalPath))
                 {
+                    EnableCaching(httpResponse);
                     httpResponse.Headers.LastModified = fileSystem.FileInfo.New(physicalPath).LastWriteTimeUtc.ToString("R");
                     return Results.File(physicalPath, "image/png");
                 }
@@ -66,5 +68,10 @@ private static string Base32Decode(string base32EncodedData)
             var base32EncodedBytes = Base32Encoding.ToBytes(base32EncodedData);
             return System.Text.Encoding.UTF8.GetString(base32EncodedBytes);
         }
+
+        private static void EnableCaching(HttpResponse httpResponse)
+        {
+            httpResponse.Headers.CacheControl = "public, max-age=31536000, immutable";
+        }
     }
 }
diff --git a/SDMetaUI/Models/ImageFileViewModel.cs b/SDMetaUI/Models/ImageFileViewModel.cs
index 999418e..0b063bf 100644
--- a/SDMetaUI/Models/ImageFileViewModel.cs
+++ b/SDMetaUI/Models/ImageFileViewModel.cs
@@ -1,28 +1,30 @@
 namespace SDMetaUI.Models
 {
-	public class ImageFileViewModel
-	{
-		private readonly Func<string, string> func;
+    public class ImageFileViewModel
+    {
+        private readonly Func<string, string> func;
+        private readonly string version;
 
-		public ImageFileViewModel(string fileName, string fullPromptHash, Func<string, string> func)
-		{
-			FileName = fileName;
-			FullPromptHash = fullPromptHash;
-			this.func = func;
-			this.EncodedFileName = new(() => Base32Encode(this.FileName));
-		}
-		public string FileName { get; }
-		public string ThumbnailUrl => $"/images/thumb/{EncodedFileName.Value}";
-		public string ImageUrl => $"/images/full/{EncodedFileName.Value}/{func(this.FileName)}";
-		public string FullPromptHash { get; }
-		public IList<ImageFileViewModel>? SubItems { get; set; }
+        public ImageFileViewModel(string fileName, string fullPromptHash, string version, Func<string, string> func)
+        {
+            FileName = fileName;
+            FullPromptHash = fullPromptHash;
+            this.version = version;
+            this.func = func;
+            this.EncodedFileName = new(() => Base32Encode(this.FileName));
+        }
+        public string FileName { get; }
+        public string ThumbnailUrl => $"/images/thumb/{EncodedFileName.Value}?v={version}";
+        public string ImageUrl => $"/images/full/{EncodedFileName.Value}/{func(this.FileName)}?v={version}";
+        public string FullPromptHash { get; }
+        public IList<ImageFileViewModel>? SubItems { get; set; }
 
-		private readonly Lazy<string> EncodedFileName; 
+        private readonly Lazy<string> EncodedFileName;
 
-		private static string Base32Encode(string plainText)
-		{
-			var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
-			return Base32Encoding.ToString(plainTextBytes);
-		}
-	}
+        private static string Base32Encode(string plainText)
+        {
+            var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(plainText);
+            return Base32Encoding.ToString(plainTextBytes);
+        }
+    }
 }
diff --git a/SDMetaUI/Models/ImageFileViewModelBuilder.cs b/SDMetaUI/Models/ImageFileViewModelBuilder.cs
index 793f209..d0ad134 100644
--- a/SDMetaUI/Models/ImageFileViewModelBuilder.cs
+++ b/SDMetaUI/Models/ImageFileViewModelBuilder.cs
@@ -3,11 +3,12 @@
 
 namespace SDMetaUI.Models
 {
-	public class ImageFileViewModelBuilder(IFileSystem fileSystem)
-	{
-		public ImageFileViewModel BuildModel(ImageFileSummary p)
-		{
-			return new ImageFileViewModel(p.FileName, p.FullPromptHash ?? "", fileSystem.Path.GetFileName);
-		}
-	}
+    public class ImageFileViewModelBuilder(IFileSystem fileSystem)
+    {
+        public ImageFileViewModel BuildModel(ImageFileSummary p)
+        {
+            var lastWriteTicks = fileSystem.FileInfo.New(p.FileName).LastWriteTimeUtc.Ticks.ToString();
+            return new ImageFileViewModel(p.FileName, p.FullPromptHash ?? "", lastWriteTicks, fileSystem.Path.GetFileName);
+        }
+    }
 }